EP0316924A1 - Lösungsmittel und Verfahren zu seiner Anwendung - Google Patents

Lösungsmittel und Verfahren zu seiner Anwendung Download PDF

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Publication number
EP0316924A1
EP0316924A1 EP88119157A EP88119157A EP0316924A1 EP 0316924 A1 EP0316924 A1 EP 0316924A1 EP 88119157 A EP88119157 A EP 88119157A EP 88119157 A EP88119157 A EP 88119157A EP 0316924 A1 EP0316924 A1 EP 0316924A1
Authority
EP
European Patent Office
Prior art keywords
composition
phthalate
viscosity
gaseous stream
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88119157A
Other languages
English (en)
French (fr)
Other versions
EP0316924B1 (de
Inventor
Arthur James Ehrler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione air - Cure Environmental Inc
Original Assignee
Sandoz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandoz AG filed Critical Sandoz AG
Publication of EP0316924A1 publication Critical patent/EP0316924A1/de
Application granted granted Critical
Publication of EP0316924B1 publication Critical patent/EP0316924B1/de
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/26—Treatment of water, waste water, or sewage by extraction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents

Definitions

  • the invention relates to a process for the recovery of materials, such as solvents, from gaseous streams containing the same and to selective solvent compositions used in this process.
  • a process is known wherein a gaseous stream, such as an air stream, is contacted with a liquid selective solvent for a component of the gaseous stream for the removal of said component from the gaseous stream, the selective solvent is recovered and heated to an elevate temperature, this temperature being higher than the temperature at which the selective solvent was contacted with the gaseous stream in order to release the absorbed component from the selective solvent, the selective solvent is cooled and brought again into contact with the gaseous stream to repeat the operation.
  • a gaseous stream such as an air stream
  • organic materials such as alcohols, ethers, esters, ketones, aldehydes, hydrocarbons, such as benzene, toluene and the xylenes, trichloroethylene, ethyl alcohol, methyl alcohol, n-butyl acetate, ethyl acetate, methyl ethyl ketone, methylene chloride, formaldehyde, ethyl ether, methyl ethyl ether, acetaldehyde, acrolein, the various mercaptans, such as methyl mercaptan, ethyl mercaptan, the various amines, such as the methylamines, ethanolamine, the low molecular weight C3 ⁇ 6-alkanes and cycloalkanes
  • organic materials such as alcohols, ethers, esters, ketones, aldehydes, hydrocarbons, such as benzene, toluene and the x
  • the selective solvent employed should desirably have a high boiling point and a low vapor pressure, exhibit selectivity and/or high solvent capacity for the material or pollutant in the gaseous stream to be removed.
  • the selective solvent employed in the practice of this process should not foam or be substantially non-foaming when aerated, be readily available at a relatively low cost, be thermally stable, exhibit low heat capacity (Cp) and have low or substantially no toxicity.
  • the liquid selective solvent employed in this process may be water immiscible and is desirably selected to have a low vapor pressure at ambient temperatures and at temperatures in the range 95° - 260°C and to have a high boiling point at atmospheric pressure, such as a boiling point of at least about 260°C, more or less, at atmospheric pressure.
  • Selective solvents which are useful in the practice of this process include the adipates, succinates, glutarates, the various alkyl phtha­lates and other esters of di- and mono-basic acids and glycols, the various organic phosphates, including the alkyl and aryl phosphates, particularly those phthalates and organic phosphates or organic phos­phorus compounds which are liquid at about ambient temperature in the range 4.5°-32°C and which are useful as plasticizers.
  • Viscosity Viscosimeter constant x (density of ball - density of solvent) x time of descent
  • the invention therefore, consists in a method of removing a pollutant or other material from a gaseous stream containing the same which comprises contacting said gaseous stream with a liquid selective solvent having a viscosity of less than 35 mPa s at a temperature of about 25°C and removing the resulting treated gaseous stream now having a reduced amount of said pollutant therein.
  • Liquid solvents which have been found to be useful in the practice of this invention, particularly blends or mixtures thereof, include: Solvent Viscosity mPa s at 25° C Diethyl phthalate (DEP) 9.5 Di-2-ethylhexyl phthalate (DOP) 5.8 Di-2-ethylhexyl adipate (DOA) 12 Acetyltributyl citrate (CA4) 32.7 Diisohexyl phthalate (DHP) 33
  • Useful blends of these solvents which blends have a viscosity less than 30 mPa s, include 60 mol percent DEP and 40 mol percent POP having a vis­cosity of 21 mPa s, 80 mol percent DEP and 20 mol percent DOP having a viscosity of l7 mPa s, 80 mol percent CA4 and 20 mol percent DOA having a viscosity of 27 mPa s, 60 mol percent CA4 and 40 mol percent DOA having a viscosity of 21 mPa s, 40 mol percent CA4 and 60 mol percent DOA having a viscosity of 18 mPa s, and 80 mol percent DOA and 20 mol percent CA4 having a viscosity of about 14 mPa s.
  • the invention therefore, also consists in a liquid selective solvent composition consisting essentially of at least two of the selective sol­vents selected from the group consisting of diethyl phthalate, dioctyl phthalate, dioctyl adipate, acetyltributyl citrate and diisohexyl phtha­late, said composition having a viscosity of less than 35 mPa s at a temperature of about 25°C.
  • Test performance data for the solvent DEP/DOP system both at 80 % floo­ding and constant gas and liquid rates indicate a better performance for the system as the viscosity of the solvent is decreased, particularly below 30 mPa s. Also, a more drastic improvement in removal efficiency is evident at 80 % flooding because the less viscous solution allows for higher liquid rates through the column to achieve optimum operating con­ditions. In addition, at 80 % flooding a more pronounced drop in effici­ency is evident when the viscosity is greater than 35 mPa 5. Performance data for the solvent DOA/CA4 system at 80 % flooding show that efficiency drops as the viscosity of the solution exceeds 30 mPa s and performance is affected dramatically when the viscosity of the solvent exceeded approximately 35 mPa s.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)
EP19880119157 1987-11-20 1988-11-18 Lösungsmittel und Verfahren zu seiner Anwendung Expired EP0316924B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US123227 1980-02-07
US12322787A 1987-11-20 1987-11-20

Publications (2)

Publication Number Publication Date
EP0316924A1 true EP0316924A1 (de) 1989-05-24
EP0316924B1 EP0316924B1 (de) 1992-02-26

Family

ID=22407433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880119157 Expired EP0316924B1 (de) 1987-11-20 1988-11-18 Lösungsmittel und Verfahren zu seiner Anwendung

Country Status (4)

Country Link
EP (1) EP0316924B1 (de)
JP (1) JPH01231922A (de)
CA (1) CA1330337C (de)
DE (1) DE3868592D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026733A1 (de) * 1990-08-24 1992-02-27 Huels Chemische Werke Ag Verfahren zur reinigung eines oxidationsabgases
DE4026732A1 (de) * 1990-08-24 1992-02-27 Huels Chemische Werke Ag Verfahren zur reinigung eines oxidationsabgases mit energierueckgewinnung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3320963A1 (de) * 2016-11-15 2018-05-16 Basf Se Verfahren zur abreicherung von aromatischem kohlenwasserstoff aus einen rohgasstrom

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2207902A1 (de) * 1972-11-29 1974-06-21 Chevron Res
DE3542537A1 (de) * 1984-12-03 1986-06-12 General Signal Corp., Stamford, Conn. Verfahren und vorrichtung zur abtrennung von verunreinigungen aus einem fluidstrom

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2207902A1 (de) * 1972-11-29 1974-06-21 Chevron Res
DE3542537A1 (de) * 1984-12-03 1986-06-12 General Signal Corp., Stamford, Conn. Verfahren und vorrichtung zur abtrennung von verunreinigungen aus einem fluidstrom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026733A1 (de) * 1990-08-24 1992-02-27 Huels Chemische Werke Ag Verfahren zur reinigung eines oxidationsabgases
DE4026732A1 (de) * 1990-08-24 1992-02-27 Huels Chemische Werke Ag Verfahren zur reinigung eines oxidationsabgases mit energierueckgewinnung

Also Published As

Publication number Publication date
EP0316924B1 (de) 1992-02-26
JPH01231922A (ja) 1989-09-18
DE3868592D1 (de) 1992-04-02
CA1330337C (en) 1994-06-21

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